Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amount capitalized	$ 433	$ 340	$ 372
Income taxes paid, net of refunds	32	24	8
(Decreases)/additions to fixed assets for accrued capital expenditures	$ (16)	$ (6)	$ 1